Diamond Stones

These stones feature a diamond abrasive layer embedded in resin, securely mounted on a durable metal base. Unlike many diamond plates that use a single layer of diamonds, these stones boast a 1mm-thick diamond-infused resin layer. This design allows the stone to gradually shed worn or clogged material, continuously exposing a fresh cutting surface. The controlled shedding process delivers a water stone-like sharpening experience with the durability and cutting power of diamond abrasives, making it ideal for even the toughest sharpening tasks. Learn More

Achieve the Ultimate Cutting Edge with Unrivaled Precision For the sharpener who demands the pinnacle of performance and a flawless finish, the Naniwa 6000 Grit Diamond Sharpening Stone represents the apex of modern sharpening technology. This is not a traditional water stone; it is a precision tool designed to take an already sharp edge to a level of breathtaking, hair-whittling refinement. It's the ultimate step for creating a true mirror polish and a silky-smooth, razor-sharp edge. The power of this stone lies in its construction. A dense layer of monocrystalline diamonds is electroplated to a perfectly flat steel plate, creating a cutting surface that is incredibly fast, durable, and will never dish or warp. Unlike water stones that require soaking, the Naniwa Diamond stone is a true "splash-and-go" system. Most importantly, its hardness makes it exceptionally effective on the most challenging, wear-resistant modern steels (like ZDP-189, M390, and S90V) that can be slow to abrade on conventional stones. Use the 6000 grit stone as your final step to remove the finest scratches from lower grits and burnish the edge to a stunning, frictionless polish. The result is an edge that glides through ingredients with zero effort, providing the cleanest possible cuts and maximizing edge retention. Learn More

Naniwa Diamond Sharpening Stones are uniquely made by taking the diamond aggregate and mixing with a 1mm thick bonding layer on a sturdy metal base. This ensures even distribution and constant cutting surface, every time, throughout the life of the stone. Used for very hard steel blades and ceramic blades. Learn More

Unlock Flawless Edges with the Ultimate Sharpening Surface: The Naniwa Diamond Stone 1000 Step up to the pinnacle of sharpening technology with the Naniwa 1000 Grit Diamond Sharpening Stone. Precision-engineered in Japan for those who refuse to compromise on sharpness, this stone is the definitive tool for maintaining and restoring a perfect, razor-sharp edge. The 1000 grit is the ideal "workhorse" grade, expertly balanced to quickly erase dullness and establish a refined edge that is ready for use or further polishing. At its core lies a perfectly flat steel plate coated with high-density monocrystalline diamonds—the hardest and most durable abrasive available. This advanced construction gives it unparalleled cutting speed, allowing you to sharpen even the most challenging modern "super steels" (like S90V, ZDP-189, and Maxamet) and ceramics with remarkable ease. Unlike traditional whetstones, the Naniwa Diamond Stone will never dish, warp, or require flattening. It guarantees a perfectly true surface for the entire life of the stone, ensuring every pass contributes to a consistent, flawless bevel. For the discerning user, this isn't just a sharpener; it's a permanent upgrade to your entire sharpening system. Learn More